Short answer: the KZ ZS10 Pro 2. It ranks #338 of 450 in-ear headphones by sound quality, rated 3.7/5, at $52.24; the KZ ZSX ranks #371, rated 3.3/5, at $49.99. Close enough in price that the sound-quality gap is the deciding factor.
The KZ ZS10 Pro 2 is the better-sounding option.
What the KZ ZSX does well: A one dynamic plus five balanced armature hybrid at a budget price, with sub-bass within 1 dB of target and midbass about 2.4 dB above it, so electronic and hip hop tracks get punchy, full lows. Watch for: Across eight hobbyist measurements on squig.link a 10 dB peak near 11.9 kHz stands out, which can make cymbals and hi hats sound splashy and tizzy, while a 6.8 dB dip near 6.5 kHz leaves the treble uneven.
Buy the KZ ZS10 Pro 2. It is rated higher for sound quality, and the $2.25 saving on the KZ ZSX is not enough to make up the difference.
Looking for alternatives? See the complete Headphones rankings.
Specifications Side By Side
| KZ ZS10 Pro 2 | KZ ZSX | |
|---|---|---|
| Price | $52.24 | $49.99 |
| Ranked | #338 of 450 in In-Ear Headphones | #371 of 450 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 70 (median of 9 squig.link measurements, calibrated to AutoEQ) | 65 (measured by crinacle, via AutoEQ) |
| Deviation From Target | 2.13 dB standard deviation | 2.73 dB standard deviation |
| Tonal Tilt | +0.80 (negative is warmer, positive brighter) | -0.63 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-3.9 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-0.9 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Hybrid (1 dynamic + 4 balanced armature) | Hybrid (1 dynamic + 5 balanced armature) |
| Drivers | 1 x 10mm dynamic + 4 x balanced armature | 1 x dynamic + 5 x balanced armature |
| Sensitivity | 108 dB | 111 dB |
| Frequency Response | 20Hz - 40kHz (Manufacturer specified) | 7Hz - 40kHz (Manufacturer specified) |
| Impedance | - | 24 ohms |
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Prices on this page were last checked October 11, 2026 at 4:59 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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The Two Headphones In Full
KZ ZS10 Pro 2: $52.24 Amazon eBay
Full KZ ZS10 Pro 2 review and specifications →
| Back | Closed |
|---|---|
| Connection | Wired |
| Deviation From Target | 2.13 dB standard deviation |
| Driver Type | Hybrid (1 dynamic + 4 balanced armature) |
| Drivers | 1 x 10mm dynamic + 4 x balanced armature |
| Form Factor | In-ear |
| Frequency Response | 20Hz - 40kHz (Manufacturer specified) |
| Harman Preference Score | 70 (median of 9 squig.link measurements, calibrated to AutoEQ) |
| Sensitivity | 108 dB |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-3.9 dB at 30 Hz) |
| Tonal Tilt | +0.80 (negative is warmer, positive brighter) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
KZ ZSX: $49.99 Linsoul eBay
Pros: A one dynamic plus five balanced armature hybrid at a budget price, with sub-bass within 1 dB of target and midbass about 2.4 dB above it, so electronic and hip hop tracks get punchy, full lows. Its 24 ohm, 111 dB rating means it plays loud straight from a phone, and it rates higher than the pricier BGVP DN3.
Cons: Across eight hobbyist measurements on squig.link a 10 dB peak near 11.9 kHz stands out, which can make cymbals and hi hats sound splashy and tizzy, while a 6.8 dB dip near 6.5 kHz leaves the treble uneven. The KZ ZS10 Pro from the same maker rates noticeably higher for slightly less money.
Full KZ ZSX review and specifications →
| Back | Closed |
|---|---|
| Connection | Wired |
| Deviation From Target | 2.73 dB standard deviation |
| Driver Type | Hybrid (1 dynamic + 5 balanced armature) |
| Drivers | 1 x dynamic + 5 x balanced armature |
| Form Factor | In-ear |
| Frequency Response | 7Hz - 40kHz (Manufacturer specified) |
| Harman Preference Score | 65 (measured by crinacle, via AutoEQ) |
| Impedance | 24 ohms |
| Sensitivity | 111 dB |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.9 dB at 30 Hz) |
| Tonal Tilt | -0.63 (negative is warmer, positive brighter) |
EQ preset to match the Harman target
Set a preamp of -5.6 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by AutoEQ from its measured frequency response.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +0.6 dB | 0.70 |
| Peak | 162 Hz | -3.8 dB | 0.64 |
| Peak | 7,279 Hz | +5.8 dB | 1.94 |
| Peak | 732 Hz | +2.9 dB | 1.14 |
| Peak | 2,111 Hz | -4.3 dB | 2.80 |
| High shelf | 10,000 Hz | -5.5 dB | 0.70 |
| Peak | 9,793 Hz | +3.2 dB | 2.14 |
| Peak | 3,249 Hz | +3.3 dB | 4.13 |
| Peak | 5,021 Hz | -2.2 dB | 6.00 |
| Peak | 2,553 Hz | -1.2 dB | 2.76 |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons